Blow molding apparatus

Details Blow molding apparatus Blow molding apparatus

1996-03-22

2000-04-11

Davis, Robert

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Molding pressure control means responsive to pressure at...

249 79, 4251744, 425522, 425526, 425532, B29C 3304, B29C 3306, B29C 4904, B29C 4964

Patent

active

060481897

ABSTRACT:
A process and an apparatus for molding, in which a molten thermoplastic resin is firmly fitted onto a molding surface of a mold under a pressure lower than or equal to 100 kg/cm.sup.2 and is cured to obtain a molded product. The molding apparatus has a mold main body, and a mold body on which the molding surface is defined. The mold body is supported relative to the mold main body with maintaining a space on the back side of the molding surface in a heat insulative manner by a supporting member which includes at least a heat insulative supporting member having a thermal conductivity of 0.001 to 1 Kcal/mh .degree.C. and a longitudinal elastic modulus of 0.01 to 10 kg/cm.sup.2. In the space, a heating fluid for heating the molding surface from the bask side to a temperature higher than or equal to Vicat softening temperate (T) .degree.C. of the thermoplastic resin and a cooling fluid for cooling the molding surface from the back side to a temperature lower than or equal to (Vicat softening temperature (T) of the thermoplastic resin -10) .degree.C. are supplied.

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patent: 5190715 (1993-03-01), Yamada et al.
patent: 5423670 (1995-06-01), Hamel
patent: 5472331 (1995-12-01), Watkins
A. Delaney et al., "Plastic Molding Apparatus", IBM Technical Disclosure Bulletin, vol. 17, No. 2, p. 479-480, Jul. 1974.

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